This is the Commodore CDTV branded Mitsumi KKQ-E94YC keyboard consisting of Mitsumi KKQ Type key switches. The Commodore part number is
364351-01. While this looks very much like a black version of the Amiga 3000/4000 keyboards, the pinout of the mini-DIN connector is specific for the Commodore CDTV and is not interchangeable with any other Amiga keyboard:[1]

1: Ground
2: Data
3: Clock
4: +5V
5: Keyboard sense (connect to +5V)

Gallery

Pictures of the Commodore CDTV branded Mitsumi KKQ-E94YC keyboard.

Keyboard top

Keyboard bottom

Keyboard mechanism, top

Keyboard mechanism, bottom

Tactile rubber sleeves

Caps lock

Space bar rubber sleeve and springs

Caps lock spring

Keyboard mechanism with keycaps

Keyboard controller

Internal label

Commodore CDTV vs Amiga 4000 keyboard

Availability

The keyboard has been desired for harvesting of black keycaps to put on other Amiga keyboards.

Replacement keycaps in black (and other colours) have been made available in a crowdfunded run from A1200.NET.